If you’re upgrading or installing a new HVAC system in California, you might hear about Title 24 HERS duct testing. This test is a must-do before your mechanical, electrical, or city inspector signs off on your project. But what is it, and why does it matter?
What Is Title 24 HERS Duct Testing?
In simple terms, this test checks your ductwork for leaks and inefficiencies. Under California’s energy regulations (Title 24), a HERS rater (a third-party Home Energy Rating System specialist) comes in with specialized equipment to measure how much air is escaping from your ducts.
Why Is It Mandatory?
The state requires it to ensure that your HVAC system runs efficiently and that you’re not wasting energy (and money) due to leaky ducts. It’s all about keeping your home or business comfortable and reducing energy consumption.
How Does the Test Work?
The HERS rater uses a machine that pressurizes your duct system to see how much air is leaking out. They might use a “duct blaster” or similar tool to measure leakage. If the ducts are too leaky, they’ll need to be sealed up before you can pass the final inspection.
When Is the Test Done?
You’ll need this test before the final mechanical, electrical, or city inspection. It’s one of the last steps to ensure your system is up to code and energy-efficient.
Why Does the State Require It?
Simply put, California cares about energy efficiency. By making sure ducts aren’t leaking, the state helps homeowners and businesses save on utility bills.